CN114689343A - Deceleration system for collision test - Google Patents
Deceleration system for collision test Download PDFInfo
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- CN114689343A CN114689343A CN202210395335.2A CN202210395335A CN114689343A CN 114689343 A CN114689343 A CN 114689343A CN 202210395335 A CN202210395335 A CN 202210395335A CN 114689343 A CN114689343 A CN 114689343A
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- rack
- friction
- speed reduction
- block
- deceleration system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0078—Shock-testing of vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention relates to the technical field of automobile part testing, in particular to a deceleration system for collision testing, which comprises a deceleration rack, wherein a multi-friction-plate structure is arranged in the deceleration rack, the multi-friction-plate structure comprises a plurality of friction bodies and brake pads which are arranged at intervals, the friction bodies are connected with the deceleration rack in a sliding manner along the distribution direction of the friction bodies, one ends of the brake pads extend out of the deceleration rack, one ends of the brake pads, which extend out of the deceleration rack, are provided with collision bodies, and when the collision bodies are acted by force, the other ends of the brake pads can extend out of the other ends of the deceleration rack. By adopting the scheme, the technical problems that the trolley is difficult to brake quickly and the test cost and the time cost are high in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of automobile part testing, in particular to a deceleration system for a collision test.
Background
When the automobile and the obstacle have a frontal collision, the energy generated by the collision needs to be fully absorbed by the deformation of the main bearing structure at the front part of the automobile so as to protect the passengers on the automobile to the maximum extent. The crashproof beam assembly and the cabin longeron among the traditional body construction can deal with the collision condition when vehicle and barrier overlap area are great through reasonable intensity design. However, when the vehicle overlaps an obstacle by less than 25% of the width of the vehicle body, the cross-member assembly and the cabin side members cannot sufficiently participate in such a collision process, and cannot achieve a sufficient energy absorption and buffering effect, which may cause the passenger cabin to be subjected to a large collision force to deform unacceptably, thereby threatening the life safety of passengers. Therefore, the safety index of the Chinese insurance automobile sets a front offset collision safety evaluation item (hereinafter referred to as '25% small offset collision') with a collision speed of 64.4Km/h and a vehicle body and rigid barrier wall overlapping rate of 25%.
In a 25% small offset crash real vehicle test, due to the limitations of field of view, instrumentation, test convenience and sample vehicle cost, test data related to dynamic response of the impact side wheels and chassis failure are difficult to capture in detail by the instrumentation. In order to obtain more test data aiming at dynamic response and failure separation phenomena of a suspension and a wheel subsystem from a 25% small-offset collision test, special tests on the failure condition of the suspension and the wheel subsystem are required, and the applicant proposes a 25% small-offset collision suspension subsystem test platform which can carry out the 25% small-offset collision test on a test piece comprising the suspension and the wheel subsystem.
The traditional braking scheme for the deceleration of the trolley is a deceleration device which uses a plurality of steel bars to deform and absorb energy, but has the following problems:
1. in the test process, the deceleration distance is short, and the rapid braking of the trolley is difficult to realize by the deformation energy absorption of the reinforcing steel bars;
2. after each test, the deformed reinforcing steel bar needs to be replaced, and the test cost and the time cost are high.
Disclosure of Invention
The invention aims to provide a deceleration system for a collision test, and aims to solve the technical problems that a trolley is difficult to brake quickly and the test cost and the time cost are high in the prior art.
The present invention provides the following basic scheme:
the utility model provides a speed reduction system for collision test, includes the speed reduction frame, is equipped with many friction disc structures in the speed reduction frame, and many friction disc structures include a plurality of friction pieces and the brake block that the interval set up, and the friction piece distributes direction sliding connection along the friction piece with the speed reduction frame, and the speed reduction frame is all stretched out to the one end of brake block, and the one end that the brake block stretched out the speed reduction frame is equipped with the collision body, and when the collision body received the effort, the other end of brake block can be stretched out from the other end of speed reduction frame.
The beneficial effects of the basic scheme are as follows: the setting of collision body receives the impact force that the platform truck collision brought to transmit for the brake block, make the brake block take place to remove, the impact force that the brake block received is overcome to the frictional force between brake block and the friction body, blocks the removal of brake block, thereby blocks the motion of platform truck. The friction body moves along the distribution direction of the friction body before collision, so that the friction body is pressed against the brake pad, the friction coefficient of the friction body and the brake pad is increased, and after collision, the friction body moves in the reverse direction, so that the friction body and the brake pad are loosened, and the brake pad is reset.
Compared with the prior art, the friction between the friction body and the brake block is used for rapid braking, the damage to the multi-friction-piece structure is avoided or reduced, the multi-friction-piece structure can be repeatedly utilized, the test cost is reduced, and the brake block only needs to be reset after the test is finished, and the time cost is reduced.
Furthermore, the brake pad guiding device further comprises a guiding rack communicated with the speed reducing rack, one end, extending out of the speed reducing rack, of the brake pad is located in the guiding rack, one end, far away from the speed reducing rack, of the guiding rack is communicated with a guiding cylinder, and one end, far away from the guiding rack, of the guiding cylinder is outwards expanded to form an opening.
Has the advantages that: open setting, the speed reduction deflector of the platform truck of being convenient for stretches into in the guide cylinder, and the setting of guide cylinder leads for the speed reduction deflector of platform truck for the speed reduction deflector can collide with the collision body, realizes quick braking with this.
Furthermore, guide reinforcing ribs are arranged on two sides of the guide cylinder, and two ends of each guide reinforcing rib are respectively connected with the guide rack and the opening.
Has the beneficial effects that: the arrangement of the guide reinforcing ribs enhances the axial rigidity of the guide cylinder, so that the guide cylinder is less in deformation and does not generate strong vibration in the guide process.
Furthermore, the collision body comprises a reinforcing part and a buffer block, the reinforcing part is connected with the brake pad, and one side of the reinforcing part, which is far away from the brake pad, is connected with the buffer block.
Has the advantages that: the setting of buffer block cushions the impact force of platform truck, and the setting of reinforcing piece increases the intensity of buffer block, reduces the damage that the impact force caused many friction disc structures.
Furthermore, an oil cylinder is arranged on one side of the outer edge of the speed reducing rack in the friction body distribution direction, and a piston rod of the oil cylinder extends into the speed reducing rack and is abutted against the friction body.
Has the advantages that: the arrangement of the oil cylinder controls the compression and the release between the friction body and the brake pad by controlling the extension and the retraction of the piston rod, thereby changing the friction coefficient between the friction body and the brake pad. During collision test, the piston rod extends out, the friction body is tightly pressed with the brake pad, the trolley is braked through the friction force between the friction body and the brake pad, after the test is finished, the piston rod contracts, the friction body is loosened with the brake pad, and the brake pad resets.
Furthermore, the top and the bottom of the friction body extend to form a blocking part, a blocking limiting part and a limiting block for limiting the blocking part are further arranged in the speed reducing rack, and the blocking limiting part and the limiting block are respectively abutted against the two ends of the blocking part along the motion direction of the brake pad.
Has the beneficial effects that: the friction body is limited by the limiting part and the limiting block, so that the friction body cannot move along the motion direction of the brake pad, and the friction force between the friction body and the brake pad is ensured.
Furthermore, still be equipped with a plurality of gibs in the speed reduction frame, gib block and speed reduction frame fixed connection, gib block is located the brake block top respectively, and is located respectively between the two friction bodies that the interval set up.
Has the advantages that: the setting of gib block leads the removal of brake block.
And the installation rack is communicated with the speed reduction rack and is used for being fixedly connected with the rigid barrier wall.
Has the advantages that: the installation rack is connected with the rigid barrier wall, so that the installation rack, the acceleration rack and the guide rack are fixed.
Furthermore, a through hole is formed in one end, far away from the collision body, of the brake pad, a cross rod is connected to the mounting rack in a sliding mode and penetrates through the through hole, and two ends of the cross rod extend out of the mounting rack; the outer both sides of speed reduction frame are equipped with first mounting bracket, and the both ends of horizontal pole are equipped with the second mounting bracket, are located to be equipped with between first mounting bracket and the second mounting bracket of homonymy and reply the spring.
Has the advantages that: the setting of horizontal pole for a plurality of brake blocks simultaneous movement, the setting of answer spring, after friction body and brake block loosen, rely on the elasticity of answer spring, make the brake block reset.
Furthermore, a first supporting rod connected with the rigid barrier wall is arranged on the guide cylinder, a vertical second supporting rod is arranged on the guide rack, one end, far away from the guide rack, of the second supporting rod is connected with the first supporting rod, and a third supporting rod connected with the rigid barrier wall is arranged on the second supporting rod.
Has the advantages that: the arrangement of the first supporting rod, the second supporting rod and the third supporting rod strengthens the support of the installation rack, the acceleration rack and the guide rack by utilizing the stability of the triangle, and enhances the structural strength and the rigidity.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a deceleration system for crash testing according to the present invention;
FIG. 2 is a schematic structural diagram of a mounting frame of an embodiment of a deceleration system for crash testing according to the present invention;
FIG. 3 is a schematic structural diagram of a multi-friction plate structure of an embodiment of a deceleration system for crash testing according to the present invention;
FIG. 4 is a schematic structural view of an assembled portion of a multi-friction plate structure of an embodiment of a deceleration system for crash testing according to the present invention;
fig. 5 is a schematic structural diagram of a guide frame and a guide cylinder of an embodiment of a deceleration system for crash testing according to the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the installation frame 1, the speed reduction frame 2, the guide frame 3, the rigid barrier wall 4, the first installation plate 5, the installation reinforcing rib 6, the first friction body 7, the second friction body 8, the brake block 9, the blocking part 10, the limiting block 11, the reinforcing part 12, the buffer block 13, the first guide strip 14, the second guide strip 15, the oil cylinder 16, the cross rod 17, the strip-shaped hole 18, the return spring 19, the guide cylinder 20, the opening 21, the guide reinforcing rib 22 and the support frame 23.
Examples
A deceleration system for a collision test is shown in figure 1 and comprises a mounting rack 1, a deceleration rack 2 and a guide rack 3 which are communicated in sequence. The installation rack 1 is used for being fixedly connected with a rigid barrier wall 4, specifically, as shown in fig. 2, the installation rack 1 is in a cylindrical shape, one end of the installation rack 1 is fixedly connected with a first installation plate 5 perpendicular to the axial direction of the installation rack 1, the first installation plate 5 is fixedly connected with the rigid barrier wall 4, and the top of the first installation plate 5 and the top of the installation rack 1 are provided with a plurality of installation reinforcing ribs 6.
A multi-friction-plate structure is arranged in the reduction rack 2, as shown in fig. 3, the multi-friction-plate structure includes a plurality of friction bodies and brake plates 9 arranged at intervals, in this embodiment, the number of the friction bodies is six, and the number of the brake plates 9 is five, in this embodiment, along the distribution direction of the friction bodies, the friction bodies on both sides are defined as first friction bodies 7, the remaining friction bodies are defined as second friction bodies 8, and one side of the first friction body 7 away from the brake plates 9 respectively abuts against both sides in the reduction rack 2.
The friction body includes friction box and friction disc, the last mounting hole of having seted up of friction box, the friction disc is located the mounting hole, and can dismantle with the friction box and be connected, and is concrete, one side of friction disc is located the mounting hole, the opposite side stretches out the mounting hole and offsets with brake block 9, the top of friction disc or the both ends of bottom extend and form the arch, set up the perforating hole that corresponds with the arch on the friction box, be equipped with the screw in the perforating hole, the one end of screw is stretched into in the mounting hole and is offset with bellied side for block that the friction disc is deviate from in the mounting hole. When the friction plate is seriously worn and needs to be replaced, the friction plate can be replaced by taking out the screw.
In this embodiment, two mounting holes are formed in the friction box, the two mounting holes are vertically arranged, the protrusion of the friction plate in the upper mounting hole is located at the top of the friction plate, and the protrusion of the friction plate in the lower mounting hole is located at the bottom of the friction plate. The mounting hole on the friction box of the first friction body 7 is defined as a first mounting hole, the mounting hole on the friction box of the second friction body 8 is defined as a second mounting hole, the first mounting hole is a blind hole and is arranged on one side, away from the rack, of the friction box, the first mounting hole corresponds to one friction plate, the second mounting hole is a hole penetrating through the friction box, and the second mounting hole corresponds to two friction plates.
The friction body and the speed reducing rack 2 are connected in a sliding mode along the distribution direction of the friction body, specifically, as shown in the attached drawing 4, the centers of the top and the bottom of the friction body extend to form a blocking portion 10, a blocking limiting portion and a limiting block 11 used for limiting the blocking portion 10 are further arranged in the speed reducing rack 2, the blocking limiting portion and the limiting block 11 are respectively abutted to two ends of the blocking portion 10 along the movement direction of the brake pad 9, and one side, far away from the friction body, of the blocking portion 10 is respectively abutted to the top and the bottom in the speed reducing rack 2. In this embodiment, the number of the limiting blocks 11 is two, and the two limiting blocks abut against the top and the bottom of the friction body respectively, the top and the bottom in the speed reduction rack 2 extend to form a blocking limiting portion respectively, the limiting blocks 11 abut against the two ends of the blocking portion 10 along the movement direction of the brake pad 9 respectively, namely, the blocking limiting portion is used for blocking the friction body from moving along the movement direction of the brake pad 9, and the limiting blocks 11 are used for blocking the friction body from moving along the resetting direction of the brake pad 9. The limiting block 11 is provided with a safety pin hole, the speed reduction rack 2 is provided with another safety pin hole matched with the safety pin hole for use, and the limiting block 11 and the speed reduction rack 2 are connected through pins through the safety pin hole. The friction body is convenient to disassemble and assemble due to the arrangement of the limiting block 11, and the blocking part 10 is limited jointly through the limiting block 11 and the blocking limiting part. In the process of speed reduction, the acting force brought by the friction body borne by the stopping limiting part is mainly used, and the strength of the stopping limiting part is ensured through the integral processing of the stopping limiting part and the speed reducing rack 2.
One end of the brake pad 9 extends out of the speed reducing rack 2, one end of the brake pad 9 extending out of the speed reducing rack 2 is provided with a collision body, and when the collision body is acted by an acting force, the other end of the brake pad 9 can extend out of the other end of the speed reducing rack 2. The collision body comprises a reinforcing part 12 and a buffer block 13, wherein the reinforcing part 12 is connected with the brake pad 9, one side of the reinforcing part 12, which is far away from the brake pad 9, is connected with the buffer block 13, and in the embodiment, the buffer block 13 is made of rubber. The reinforcement 12 includes first connecting plate, second connecting plate, a plurality of vertical strengthening rib and horizontal strengthening rib, and in this embodiment, the quantity of vertical strengthening rib is three, and the quantity of horizontal strengthening rib is six. The one end that brake block 9 stretches out speed reduction frame 2 is connected with first connecting plate, and one side and vertical strengthening rib fixed connection that brake block 9 was kept away from to first connecting plate, vertical strengthening rib evenly distributed, the one end that first connecting plate was kept away from to vertical strengthening rib are equipped with the second connecting plate, and the second connecting plate passes through bolt fixed connection with buffer block 13. Horizontal strengthening rib evenly distributed is in the both sides of vertical strengthening rib, and the one end of horizontal strengthening rib all is connected with one side of vertical strengthening rib, and is concrete, along the vertical strengthening rib of vertical strengthening rib distribution direction both sides respectively with three horizontal strengthening rib fixed connection, in this embodiment, first connecting plate, second connecting plate, vertical strengthening rib and horizontal strengthening rib integrated into one piece.
A plurality of guide strips are further arranged in the speed reducing rack 2, the number of the guide strips is the same as that of the brake pads 9, and the guide strips are respectively positioned above the brake pads 9 and between two friction bodies which are arranged at intervals. The length of the guide strips on the two sides of the distribution direction of the guide strips is greater than that of the rest of the guide strips, in the embodiment, the guide strips on the two sides are defined as a first guide strip 14, the rest of the guide strips are defined as a second guide strip 15, the length of the first guide strip 14 is greater than that of the second guide strip 15, specifically, the second guide strip 15 is positioned in the speed reduction rack 2, and one end of the first guide strip 14 extends out of the rack. The top and the bottom of first connecting plate all extend and form the spacing portion of direction, and the quantity of spacing portion is four, is located the both sides of first connecting plate top and bottom respectively, and the spacing portion of direction is used for spacing first gib block 14. The gib block and 2 fixed connection of speed reduction frame, in this embodiment, set up threaded hole on the gib block, the screw hole respectively with block spacing portion, stopper 11 is corresponding, set up respectively on stopper 11 and the speed reduction frame 2 with the through hole that the screw hole cooperation was used, through screw fixed connection gib block and speed reduction frame 2 to and fixed connection gib block, stopper 11 and speed reduction frame 2. The arrangement of the safety pin holes plays a role in protection when the guide strips, the limiting blocks 11 and the speed reducing rack 2 are fastened by screws and fail.
An oil cylinder 16 is arranged on one side of the outer edge of the speed reducing frame 2 in the friction body distribution direction, the oil cylinder 16 is fixedly connected with the frame through a screw, a piston rod of the oil cylinder 16 extends into the speed reducing frame 2 and abuts against the friction bodies, namely, one side of one of the first friction bodies 7, which is far away from the brake pad 9, abuts against the piston rod.
One end of the brake block 9 extending out of the speed reducing rack 2 is positioned in the guide rack 3, and when the collision body is acted by force, the other end of the brake block 9 can extend into the installation rack 1 from the other end of the speed reducing rack 2. As shown in fig. 5, the guiding frame 3 is cylindrical, one end of the guiding frame 3, which is far away from the decelerating frame 2, is communicated with a guiding cylinder 20, and two sides of one end of the guiding cylinder 20, which is far away from the guiding frame 3, are expanded outwards to form an opening 21. A plurality of guiding reinforcing ribs 22 are arranged on two sides of the guiding cylinder 20, in this embodiment, the number of the guiding reinforcing ribs 22 is six, and two ends of the guiding reinforcing ribs 22 are respectively connected with the guiding frame 3 and the opening 21.
Still include support frame 23, support frame 23 includes second mounting panel, first branch, second branch and third branch, and the second mounting panel is with 4 fixed connection of rigid barrier wall. The guide cylinder 20 is provided with a first supporting rod connected with the rigid barrier wall 4, and specifically, two ends of the first supporting rod are respectively fixedly connected with the second mounting plate and the top of the guide cylinder 20. Be equipped with vertical second branch on the direction frame 3, the one end that direction frame 3 was kept away from to second branch is connected with first branch, and is concrete, the vertical setting of second branch, the both ends of second branch respectively with the top fixed connection of first branch, direction frame 3. And a third supporting rod connected with the rigid barrier wall 4 is arranged on the second supporting rod, and specifically, two ends of the third supporting rod are respectively fixedly connected with the second mounting plate and the second supporting rod.
The specific implementation process is as follows:
during testing, the first mounting plate 5 and the second mounting plate are fixedly connected with the rigid barrier wall 4, the return spring 19 is in a natural state at the moment, the piston rod extends out, and the friction body is tightly pressed with the brake pad 9. When the tire bumps, the collision body that the speed reduction deflector of platform truck stretched into guide cylinder 20 and direction frame 3 in from uncovered 21 bumps, the collision body receives the effort, brake block 9 removes towards installation frame 1, make the other end of brake block 9 can stretch into installation frame 1 from the other end of speed reduction frame 2, at the removal in-process of brake block 9, the removal of brake block 9 drives horizontal pole 17 and removes in bar hole 18, make answer spring 19 tensile, the frictional force between brake block 9 and the friction piece blocks the removal of brake block 9 simultaneously, carry out quick braking to the platform truck through frictional force. After the test is finished, the piston rod is contracted, the friction body and the brake pad 9 are loosened, and the cross rod 17 is driven to move in the strip-shaped hole 18 by the elasticity of the return spring 19, so that the brake pad 9 is reset.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A deceleration system for crash testing, comprising: including the speed reduction frame, be equipped with many friction disc structures in the speed reduction frame, many friction disc structures include a plurality of friction pieces and the brake block that the interval set up, and the friction piece distributes direction sliding connection along the friction piece with the speed reduction frame, and the speed reduction frame is all stretched out to the one end of brake block, and the one end that the brake block stretches out the speed reduction frame is equipped with the collision body, and when the collision body received the effort, the other end of brake block can be stretched out from the other end of speed reduction frame.
2. A deceleration system for crash testing according to claim 1, wherein: the brake pad guiding device is characterized by further comprising a guiding rack communicated with the speed reducing rack, one end, extending out of the speed reducing rack, of the brake pad is located in the guiding rack, one end, far away from the speed reducing rack, of the guiding rack is communicated with a guiding cylinder, and one end, far away from the guiding rack, of the guiding cylinder is outwards expanded to form an opening.
3. A deceleration system for crash tests according to claim 2, characterized in that: the both sides of guide cylinder are equipped with the direction strengthening rib, and the both ends of direction strengthening rib are connected with direction frame, uncovered respectively.
4. A deceleration system for crash testing according to claim 1, wherein: the collision body comprises a reinforcing part and a buffer block, the reinforcing part is connected with the brake pad, and one side of the reinforcing part, which is far away from the brake pad, is connected with the buffer block.
5. A deceleration system for crash testing according to claim 1, wherein: an oil cylinder is arranged on one side of the outer edge of the speed reducing rack in the friction body distribution direction, and a piston rod of the oil cylinder extends into the speed reducing rack and abuts against the friction body.
6. A deceleration system for crash testing according to claim 1, wherein: the top and the bottom of the friction body extend to form a blocking part, a blocking limiting part and a limiting block which are used for limiting the blocking part are further arranged in the speed reducer rack, and the blocking limiting part and the limiting block are respectively abutted against the two ends of the blocking part along the motion direction of the brake pad.
7. A deceleration system for crash testing according to claim 1, wherein: still be equipped with a plurality of gibs in the speed reduction frame, gib block and speed reduction frame fixed connection, gib block top is located respectively to the gib block, and is located respectively between the two friction bodies that the interval set up.
8. A deceleration system for crash testing according to claim 1, wherein: the mounting rack is communicated with the speed reduction rack and is used for being fixedly connected with the rigid barrier wall.
9. A deceleration system for crash tests according to claim 8, characterized in that: a through hole is formed in one end, far away from the collision body, of the brake pad, a cross rod is connected to the mounting rack in a sliding mode and penetrates through the through hole, and two ends of the cross rod extend out of the mounting rack; the outer both sides of speed reduction frame are equipped with first mounting bracket, and the both ends of horizontal pole are equipped with the second mounting bracket, are located to be equipped with between first mounting bracket and the second mounting bracket of homonymy and reply the spring.
10. A deceleration system for crash testing according to claim 2, wherein: the guide cylinder is provided with a first supporting rod connected with the rigid barrier wall, the guide rack is provided with a vertical second supporting rod, one end, far away from the guide rack, of the second supporting rod is connected with the first supporting rod, and the second supporting rod is provided with a third supporting rod connected with the rigid barrier wall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210395335.2A CN114689343B (en) | 2022-04-14 | 2022-04-14 | Deceleration system for collision test |
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|---|---|---|---|
| CN202210395335.2A CN114689343B (en) | 2022-04-14 | 2022-04-14 | Deceleration system for collision test |
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| CN114689343B CN114689343B (en) | 2023-04-18 |
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